Abstract

It is now commonly accepted that the turbulence resulting from the non-linear saturation of micro-instabilities, particularly Ion Temperature Gradient (ITG) driven modes, plays an important role in the anomalous transport observed in tokamaks. However, in contrast with tokamak-5, there is no experimental evidence of anomalous trans- port in the plasma core in stellarators. Transport in these devices is currently well explained with the help of the neoclassical theory except near the edge of the configurations where turbulence occurs. This explains the small number of theoretical studies on anomalous transport in these devices. Furthermore, the next generation of stellarators, particularly the quasi-symmetric (QS) systems, are hoped to be characterized by a much smaller neo-classical transport and by particle confinement close to that of tokamaks. There is then a strong interest in the stellarator community to study the properties of drift waves in, 3D magnetic configurations.